Transmitter
radio signal emitting machine
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In electronics, a transmitter is a device which sends signals using radio waves.
The transmitter converts direct current (DC) into alternating current (AC) at the desired frequency. Most transmitters use a quartz crystal to set the frequency of the resulting carrier wave. A modulator modifies the carrier wave, by frequency modulation or amplitude modulation or some other kind, to include the information needed, such as an audio or video signal. The modified waves are sent by an antenna to another antenna at the receiver which extracts the information from the waves.
Other websites
change- International Telecommunication Union
- Jim Hawkins' Radio and Broadcast Technology Page Archived 2017-02-02 at the Wayback Machine
- WCOV-TV's Transmitter Technical Website Archived 2006-07-03 at the Wayback Machine
- Major UK television transmitters including change of group information, see Transmitter Planning section.
- Richard Moore's Anorak Zone Photo Gallery of UK TV and Radio transmission sites Archived 2012-12-09 at Archive.today
